High resolution spectra of the symbiotic star AG Pegasi in 2004-2006

Abstract

Results of the analysis of observational data obtained over a three-year period from the symbiotic star AG Pegasi are presented in this article; the data presented herein were obtained using a Echelle spectrograph located at the Bohyunsan Astronomical Observatory (BOAO) in Korea. The phases of AG Pegasi range from 0.01 to 0.72. The characteristic line profiles of H I, He I, He II, O I, and Fe II, at wavelengths ranging between 3800 Å and 9000 Å, were observed. These line profiles, except for Fe II, were deconvoluted with several Gaussian functions. On the basis of the features of both the lines that evolved during observations in 2004-2006 and the deconvoluted lines, collision of two winds and jet flows could be confirmed, and a wobble motion of the accretion disk has been suggested. © 2008 Elsevier B.V. All rights reserved.